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Delayed hypersensitivity response and vitamin D deficiency.

G Toss, T Symreng

    International Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition
    |January 1, 1983
    PubMed
    Summary
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    Vitamin D deficiency may cause anergy, a reduced immune response in elderly individuals. Supplementation with vitamin D or UV irradiation normalized immune function in deficient patients.

    Area of Science:

    • Immunology
    • Endocrinology

    Background:

    • Delayed hypersensitivity is a key immune response.
    • Vitamin D plays a role in immune regulation.
    • Anergy, or lack of immune response, is observed in some elderly individuals.

    Purpose of the Study:

    • To investigate the relationship between delayed hypersensitivity and serum 25-hydroxyvitamin D levels in the elderly.
    • To determine if vitamin D deficiency contributes to anergy.

    Main Methods:

    • Sixty-three elderly individuals underwent skin testing with five recall antigens.
    • Serum 25-hydroxyvitamin D levels were measured.
    • A subset of anergic individuals received vitamin D or UV treatment.

    Main Results:

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  • Anergic individuals had significantly lower serum 25-hydroxyvitamin D levels compared to those with normal reactivity.
  • Treatment with vitamin D or UV irradiation normalized both vitamin D levels and delayed hypersensitivity.
  • Anergic individuals not receiving treatment showed persistent anergy.

    • Conclusions:

    • Vitamin D deficiency may be a contributing factor to delayed hypersensitivity anergy in some elderly individuals.
    • Restoring vitamin D levels can improve immune function in anergic patients.